@article{1183493758, author = {Langford, C. H.}, title = {Hilbert and Ackermann on Mathematical Logic}, journal = {Bull. Amer. Math. Soc.}, volume = {36}, number = {11}, year = {1930}, pages = { 22-25}, language = {en}, url = {http://dml.mathdoc.fr/item/1183493758} }
Langford, C. H. Hilbert and Ackermann on Mathematical Logic. Bull. Amer. Math. Soc., Tome 36 (1930) no. 11, pp. 22-25. http://gdmltest.u-ga.fr/item/1183493758/